Asthma: A common condition characterized by inflammation of the airways, leading to episodes of wheezing, coughing, chest tightness, and shortness of breath. The choking sensation could be due to severe bronchospasm or airway obstruction.

Chronic Obstructive Pulmonary Disease (COPD): Includes conditions like emphysema and chronic bronchitis, which can cause cough and a sensation of choking due to airflow limitation.
Gastroesophageal Reflux Disease (GERD): Stomach acid reflux into the esophagus can trigger a cough and a choking sensation, especially when lying down or after eating.
Postnasal Drip: Mucus running down the back of the throat can cause a cough and a sensation of choking, often associated with allergic rhinitis or a cold.

Foreign Body Aspiration: Especially in children, but also in adults, aspiration of a foreign body can cause sudden onset of cough and a choking sensation, which is a medical emergency.
Pulmonary Embolism: Although less common, a pulmonary embolism can present with sudden onset of cough and a feeling of choking, along with other symptoms like chest pain and shortness of breath.
Laryngospasm or Epiglottitis: These conditions involve the upper airway and can cause severe choking sensations, often accompanied by difficulty speaking or swallowing.

Angioedema: A rare condition that can cause swelling of the airways, leading to a choking sensation and cough, often associated with allergic reactions or hereditary conditions.
Tracheal or Bronchial Tumors: Although rare, tumors in the airways can cause obstructive symptoms, including cough and a sensation of choking.
Eosinophilic Esophagitis: An inflammatory condition of the esophagus that can cause difficulty swallowing and a sensation of food getting stuck, potentially leading to coughing and a choking sensation.